I hate shit like this. I remember hating shit like this as a kid. I don't want people telling my kid stuff like this, although I know it's inevitable. I also don't want to be that parent who raises hell about every little thing.
The thing is, I don't really think this is a little thing. I think this kind of message, taken together with all the other little lies found in motivational materials for kids, sends a clear message to kids that adults are full of crap. And if there's anything I want to succeed at, it's having an honest and close relationship with my kid. I want her to be able to talk to me about anything, and to trust me and believe what I say. And feeding them shit like this from the very beginning seems like the last thing you should do to accomplish this.
Of course, that doesn't mean that I think we should be soul-crushingly honest and cynical and discourage them from exploring their world and taking on their own projects and being creative and searching for their own passions. And I also think that we have to be age-appropriate and be careful to discuss things with them when they're ready. But that doesn't mean we should outright lie to them when they're young. I just don't think we should tell them that somehow everything will magically fall into their laps if they just think positively enough or work hard enough or are pretty/smart/witty/popular enough. Because life just isn't like that, and the more honest adults are with you about the things they've learned and the mistakes they've made and the realities they've encountered in their lives the better off you'll be. And if nothing else, at least you'll have one person in your life who's consistently honest with you, and doesn't just tell you what they think you want to hear. There's gotta be some value in that.